--Must I clean the classroom now, Miss Wang? --No, you needn’t . It by Bill.
—Who is the little girl in the picture? —It's me. The picture __________10 years ago.
—Mom, when can I go out to play football? —Finish your homework first, or I ________let you go out.
What time do you expect her________?
Elephants eat________, but they can move _______when necessary.
—What do you think of Liu Huan? —Oh, he is my favourite singer. I think no one can sing________.